Automatic cut-off.



PATENTED JAN. 9, 1906. E. G. & J. R; ROSE.

AUTOMATIC CU'IFOFF.

APPLICATION FILED JUNE 2'1. 1905- 2 SHEETS-SHEET 1.

No. 809,749. PATENTED JAN. 9, 1906. E. G. & J. R. ROSE.

AUTOMATIC OUT-OFF.

APPLICATION FILED JUNE 27.1905

2 SHEETSSHEET Z.

I nueufozq;

UNITED STATES PATENT OFFICE.

EDXVIN G. ROSE AND JAMES R. ROSE, OF EMPIRE. OHIO, ASSIGNORS OF ONE-THIRD TO FRED G. PORTER, OF W'ELLSVILLE, OHIO.

AUTOMATIC'CUT-OFF.

I Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed June 27,1905. Serial No. 267,263.

T all whom it 11mg concern.-

Be it known that we, EDWIN G. RosE and JAMES R. Rose, citizens of the United States, residing at Empirefin the county of J eiferson and State of Ohio, have invented new and useful Improvements in Automatic Out-Offs, of which the following is a specification.

Our invention relates to automatic cut offs, and its primary object is to provide a novel and highly useful device of this character to be interposed between the gas-main and service-pipes and to close when the flow of gas in the main is cut off the entrance to the service-pipes, which remains closed after the flow in the main has been reestablished until the closure is manually removed and the device again set, whereby all liability of gas escaping through open ets as the result of the flow of the gas-main being cut off and reestablished is obviated.

With the above and other objects in view the invention consists in the construction, combination, and arrangement of parts more fully hereinafter described, claimed, and illus. trated in the accompanying drawings, which disclose the preferred form of our invention, and in which Figure 1 is a centrallongitudinal sectional view through a cut-off constructed in accordance with our invention. Fig. 2 is a similar view illustrating the manner in which the entrance to the service-pipe may be closed. Fig. 3 is a sectional view on the line 3 3, Fig. 1. Fig. 4 is a sectional view on the line 4 4, Fig. 1. Fig. 5 is a detail perspective view of the closure, and Fig. 6 is a detail perspective of the operating-lever. I

Referring to the drawings by referencenumerals, l designates a casing having its upper end fully open. The upper edges of the casing are turned downwardly and inwardly to provide flanges 2, to which is secured a cover 3, it being understood that the cover is sealed in applied position, whereby to prevent the escape of gas from the casing. A partition 4 is located within the casing near the bottom thereof and extends from one end wall longitudinally to a point adjacent the other end wall. A cylinder 5 is sup- 50 ported by this partition 4 and has its upper end fully open and its bottom provided with an entrance 6, surrounding which is a depending collar 7. An opening 8 is located within the bottom of the casing 1 in alinement with the opening 6, and said opening 8 is also provided with a depending collar 9. The collars 7 and 9 are internally screwthreaded to receive a short pipe-section 10, said pipe-section being connected with the gas-main in any suitable manner. A cover 11 is removably secured to the upper end of the cylinder 5 and is provided with a centrally-arranged opening 12. A plunger 13 is movable within the cylinder 5 and is provided with an upwardly-projecting stem 14, which projects through the opening 12 and has its upper end provided with a slot 15. A supporting-rod 16 is fixed transversely of the casing and has journaled thereon an L- shaped operating-lever 17. The extremity of the arm 18 of this lever projects into and works loosely within the slot 15.

It will be seen that gas will flow from the main through'the pipe-section 10 into the cylinder 5 and thence into the casing 71 through a port 19 in the cylinder and that the pressure of the gas will retain the plunger 13 in the up er end of the cylinder 5, as illustrated in ig. 1 of the drawings. Then the gas in the main is shut ofl, the pressure within the cylinder 5 will be relieved and then the plunger 5 will descend. This descending of the plunger rocks the lever 17 in a manner. that is apparent.

Situated at a point removed from the cylinder 5 is a small casing comprising side walls 7 20 and a top portion 21, the top portion 21 being provided with a port 22.

The bottom of the casing 1 is provided with an opening around which is arranged a depending flange 23. A short pipe-section 24 has threaded connection with said flange 23 and has its upper end disposed around the port 22, whereby the gas may pass through the pipe 24 into the service-pipes, which are suitably connected to said pipesection. Ways or guides 25 are secured to the upper surface of the portion 21 transversely thereof, and slidably mounted in said ways is a valve 26. This valve is provided with a projecting arm 27, which has its extremity en.- gaging normally the lower curved portion of the arm 28 of the lever 17. The valve 26 is adapted to be moved off of the port 22 by means of a rod 29, passing through a stuffing-box in one of the end walls in the easing 1. The rod 29 is provided at one end with a stop 30 and at its other end with a head 31. Interposed betweenthe head 31 and the stufling-boX is a coiled spring 32, which retains the extremity of the rod out of engagement with the valve 26. In the downward movement of the plunger 13 the lever 17 will be rocked, and as the forward end of the projection 27 is in engagement with the arm 28 the valve will be moved to close the port 22. The valve will remain in its closed position until moved by means of the rod 29. It is thus apparent that when the flow of gas in the main has been cut oii the valve 26 will close the port 22, and thus prevent the entrance of gas into the service-pipes after the flow of gas has been reestablished, thereby obviating all liability of gas escaping through open jets. It is further apparent that when the plunger is in its lower position within the cylinder 5 it will act to retain the lever 17 rigid and that as said lever is in contact with the arm 27 the valve cannot be moved to open the port 22 until the flow of gas is again established and the plunger moved upward, thus aflording means whereby to determine whether or not the flow of gas has been again I established.

From the foregoing description, taken in connection with the accompanying drawings, the construction and mode of operation of the invention will be understood without a further extended description.

Changes in the form, proportions, and minor details of construction may be made within the scope of the invention without departing from the spirit or sacrificing any of the advantages thereof.

Having thus fully described the invention, what is claimed as new is- 1 An automatic cut-off comprising a casing provided with an inlet-port and an outletport, a guide arranged on each side of the outlet-port, a valve mounted within said guides for horizontal movement and provided with an arm, means controlled by gaspressure and normally engaging the arm of said valve, said means being adapted to move and retain the valve over the outletport when and during the time the gaspres sure is cut off, and to be moved out of the path of said arm by the gas-pressure when reestablished.

2. An automatic cut-off comprising a casing provided with an inlet-port and an outlet-port, a guide arranged on each side of the outlet-port, a valve mounted Within said guides for horizontal movement and provided with an arm, an L-shaped lever mounted within the casing and having one of its.

ends disposed to normally engage the arm of the valve, means having connection with said L-shaped lever and controlled by gas pressure, said means being adapted to rock the L-shaped lever, whereby to move and retain the valve over the outlet-port when and during the time the gas-pressure is cut off, and to be operated to move the said L-shaped lever out of engagement with the arm of the valve by the gas-pressure whenreestablished, and means independent of the first-named means by which the valve may be moved to open the outlet-port after the reestablish ment of the gas-pressure.

3. An automatic cut-off comprising a casing provided with an inlet-port and an outlet-port, a valve for said outlet-port and adapted for movement in a horizontal direc tion, means controlled by gas-pressure and normally engaging said valve, said means being adapted to move and retain the valve over the outlet-port when and during the time the gas-pressure is cut off, and to be moved out of the path of said valve by the gas-pressure when reestablished, and means independent of the first-named means by which the valve may be moved to open the outlet-port after the reestablishment of the gas-pressure.

4. An automatic cut-off comprising a casing provided with an inlet and an outlet port, a valve for said outlet-port and adapted for movement in a horizontal direction, a lever mounted within the casing and normally engaging said valve, means controlled by gaspressure and having engagement with said lever, said means being adapted to operate the lever to move'and retain the valve over the outlet-port when and during the time the gas-pressure is cut off, and to be moved to withdraw the lever from engagement with said valve by the gas-pressure when reestablished, and means independent of the firstnamed means by which the valve may be operated to open the outlet-port after the reestablishment of the gas-pressure. I

In testimony whereof we afliX our signatures in presence of two witnesses.

EDVIN G. ROSE. JAMES R. ROSE.

Witnesses:

DAVID E. GRIFFITH, JAMEs S. WILKINSON. 

